257623328 has 12 divisors (see below), whose sum is σ = 507195990. Its totient is φ = 128811648.

The previous prime is 257623319. The next prime is 257623339. The reversal of 257623328 is 823326752.

It can be written as a sum of positive squares in only one way, i.e., 253828624 + 3794704 = 15932^2 + 1948^2 .

It is a junction number, because it is equal to n+sod(n) for n = 257623291 and 257623300.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4025333 + ... + 4025396.

Almost surely, 2^257623328 is an apocalyptic number.

It is an amenable number.

257623328 is a deficient number, since it is larger than the sum of its proper divisors (249572662).

257623328 is an equidigital number, since it uses as much as digits as its factorization.

257623328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050739 (or 8050731 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 257623328 is about 16050.6488342372. The cubic root of 257623328 is about 636.2997150192.

The spelling of 257623328 in words is "two hundred fifty-seven million, six hundred twenty-three thousand, three hundred twenty-eight".